/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.runners.fnexecution.jobsubmission;



import com.bff.gaia.unified.model.pipeline.v1.RunnerApi;

import com.bff.gaia.unified.vendor.grpc.v1p13p1.com.google.protobuf.Struct;

import com.bff.gaia.unified.vendor.guava.com.google.common.util.concurrent.ListeningExecutorService;

import com.bff.gaia.unified.vendor.guava.com.google.common.util.concurrent.MoreExecutors;

import com.bff.gaia.unified.vendor.guava.com.google.common.util.concurrent.ThreadFactoryBuilder;



import javax.annotation.Nullable;

import java.io.IOException;

import java.util.concurrent.Executors;

import java.util.concurrent.ThreadFactory;



/** Factory to create {@link JobInvocation} instances. */

public abstract class JobInvoker {



  private final ListeningExecutorService executorService;



  /** Start running a job, abstracting its state as a {@link JobInvocation} instance. */

  protected abstract JobInvocation invokeWithExecutor(

      RunnerApi.Pipeline pipeline,

      Struct options,

      @Nullable String retrievalToken,

      ListeningExecutorService executorService)

      throws IOException;



  JobInvocation invoke(RunnerApi.Pipeline pipeline, Struct options, @Nullable String retrievalToken)

      throws IOException {

    return invokeWithExecutor(pipeline, options, retrievalToken, this.executorService);

  }



  private ListeningExecutorService createExecutorService(String name) {

    ThreadFactory threadFactory =

        new ThreadFactoryBuilder().setNameFormat(name).setDaemon(true).build();

    return MoreExecutors.listeningDecorator(Executors.newCachedThreadPool(threadFactory));

  }



  protected JobInvoker(String name) {

    this.executorService = createExecutorService(name);

  }

}